Catalyst with specified pore size distribution

Abstract

Heavy hydrocarbons are hydrotreated to increase content of components boiling below 1000° F. by contact with Group VIII non-noble metal oxide and Group VI-B metal oxide on alumina having a Total Surface Area of 150-240 m 2 /g, a Total Pore Volume, (TPV) of 0.7-0.98, and a Pore Diameter Distribution whereby ≦20% of the TPV is present as primary micropores of diameter ≦100 Å, at least about 34% of TPV is present as secondary micropores of diameter of about 100 Å-200 Å, and about 26%-46% of the TPV is present as mesopores of diameter ≧200 Å.

What is claimed: 
     
       1. A catalyst characterized by its ability to hydrotreat a charge hydrocarbon feed containing components boiling above 1000° F., and sediment-formers, sulfur, metals, asphaltenes, carbon residue, and nitrogen which comprises a porous alumina support bearing 2.2-6 wt % of a non-noble Group VIII metal oxide, 13-24 wt % of a Group VI-B metal oxide, and 0-2 wt % of a phosphorus oxide, said catalyst having a Total Surface Area of 150-240 m 2  /g, a Total Pore Volume of 0.7-0.98 cc/g, and a Pore Diameter Distribution whereby less than about 20% of the Total Pore Volume is present as primary micropores of diameter less than about 100 Å, about 34%-74% of the Total Pore Volume is present as secondary micropores of diameter of about 100 Å-200 Å, about 26-46% of the Total Pore Volume is present as mesopores of diameter ≧200 Å, about 22-32% of the Total Pore Volume is in pores having diameters ≧250 Å, and macropores of diameters ≧1000 Å are present in an amount of about 14-22% of the Total Pore Volume.   
     
     
       2. A catalyst as claimed in claim 1 wherein the catalyst further comprises silica (SiO 2 ) in an amount less than about 2.5 wt %. 
     
     
       3. A catalyst as claimed in claim 1 wherein phosphorus oxide is present and is present in an amount of less than or equal to 0.2 wt %. 
     
     
       4. A catalyst as claimed in claim 1 wherein said Total Surface Area is about 165-210 m 2  /g. 
     
     
       5. A catalyst as claimed in claim 1 wherein said Total Pore Volume is about 0.75-0.95 cc/g. 
     
     
       6. A catalyst as claimed in claim 1 wherein the Pore Volume of pores of diameter less than about 100 Å is less than about 18% of Total Pore Volume. 
     
     
       7. A catalyst as claimed in claim 1 wherein secondary micropores of diameter of about 100-200 Å are present in amount of at least about 50-74% of Total Pore Volume. 
     
     
       8. A catalyst as claimed in claim 1 wherein secondary micropores of diameter of about 100-200 Å are present in an amount of 0.40 cc/g to 0.66 cc/g. 
     
     
       9. A catalyst as claimed in claim 1 wherein mesopores of diameter of ≧200 Å are present in amount of 0.195-0.333 cc/g. 
     
     
       10. A catalyst characterized by its ability to hydrotreat a charge hydrocarbon feed containing components boiling above 1000° F., and sediment-formers, sulfur, metals, asphaltenes, carbon residue, and nitrogen which comprises a porous alumina support bearing 2.2-6 wt % of a non-noble Group VIII metal oxide, 7-24 wt % of a Group VI-B metal oxide, and 0-2 wt % of a phosphorus oxide, said catalyst having a Total Surface Area of 150-240 m 2  /g, a Total Pore Volume of 0.7-0.98 cc/g, and a Pore Diameter Distribution whereby less than about 15% of the Total Pore Volume is present as primary micropores of diameter less than about 100 Å, at least about 50%-74% of the Total Pore Volume is present as secondary micropores of diameter of about 100 Å-200 Å, and about 26-35% of the Total Pore Volume is present as mesopores of diameter ≧200 Å, about 22-32% of the Total Pore Volume is in pores having diameters ≧250 Å, and about 14-22% of the Total Pore Volume is present as macropores of diameter ≧1000 Å.